142122665 has 4 divisors (see below), whose sum is σ = 170547204. Its totient is φ = 113698128.

The previous prime is 142122647. The next prime is 142122713. The reversal of 142122665 is 566221241.

142122665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24790441 + 117332224 = 4979^2 + 10832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142122665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14212262 + ... + 14212271.

It is an arithmetic number, because the mean of its divisors is an integer number (42636801).

Almost surely, 2^142122665 is an apocalyptic number.

It is an amenable number.

142122665 is a deficient number, since it is larger than the sum of its proper divisors (28424539).

142122665 is an equidigital number, since it uses as much as digits as its factorization.

142122665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28424538.

The product of its digits is 5760, while the sum is 29.

The square root of 142122665 is about 11921.5210858346. The cubic root of 142122665 is about 521.8605258036.

The spelling of 142122665 in words is "one hundred forty-two million, one hundred twenty-two thousand, six hundred sixty-five".